<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button>fetch请求</button>
    <script>
        const btn = document.querySelector('button');
        btn.onclick = function(){
            fetch('http://127.0.0.1:8000/fetch-server',{
                method:'POST',
                headers:{
                    name:'ajoifj'
                },
                body:'username=admin',
            }).then(res => {
                return res.json()
            }).then(res => {
                console.log(res);
            })
        }
    </script>
</body>
</html>